QEV semi question

[tigerblues28]

Greetings,
I made a qev with a really good sealing face (3 layers of bike tire rubber) and I'm using a return spring. The QEV is piloted by a unmodded blow gun.

My question is will it be semi auto or should I make a valve of some?

Thanks in advance,
Nick

[jackssmirkingrevenge]

If you have a large enough chamber, it will give you multiple shots if you press and release the blowgun trigger quickly enough for each shot.